bjowett
Supporting Vendor
Well, the FZJ has been the driveway for about 4 days, and despite the below zero temperatures, I did manage to briefly crawl underneath there and begin to take measurements for a new exhaust system. The plans will probably finish off what Toyota began with on the 93/94 vehicles... and that is a nice dual system. Starting off will be some nice 2" or maybe 2 1/8" downpipes which will lead to the dual converters - I may possibly replace these with something a tad larger. From the converters the system will drop into dual 1 7/8"" pipes and a nice dual in/dual out straight through core muffler. The exit pipes from the muffler will probably keep the 1 7/8" diameter through to tail pipes. Obviously, any sections that can be placed in a more appropriate rock friendly area, will be. The diameter are the same as stock, or slightly larger, much of the size dictated by what I have available. The stock system appears to be dual 2" from the manifolds to the converters, then a single 2 3/8" out to the rear resonator. My system will have slighly more internal flow area... plus the dual system should keep velocity up. The real gains will be had by the straight through muffler.
Materials - 304 grade stainless or above is the only way to go. I've built a few systems from it over recent years... it can be very fun to work with. Unfortunately, SS can be very expensive. Luckily for me, I have all the required material stored in the garage. Much of it was picked up at the local scrap yard. Also, a few years back, a nearly new exhaust sytem was spied on a late 70's Mercedes 450SL V8 car that was sitting in the local auto salvage yard....A complete front to back dual stainless system w/ 2 mufflers! Further examination showed it to be an $800+ Timevalve aftermarket system, it came home with me for $30, and in the garage it has sat... just waiting to be cut up for a project such as this! The pipe is 2" and 1 7/8" with plenty of nice bends. The main muffler measures 25" L x 7" diameter and has dual 2" in and out with straight though perforated core (like Borla). The stock FZJ80 muffler measures roughly 24"L x 8" diameter. Ooooooh what a nice fit that will be... tucked 1" higher in the frame.
That's it for part 1.... Warmer weather will need to arrive before the work begins. I will update with plenty of pictures if you folks would like to see them!
Part of the Timevalve system..
Part of my stainless steel stash..
Previous work....
Materials - 304 grade stainless or above is the only way to go. I've built a few systems from it over recent years... it can be very fun to work with. Unfortunately, SS can be very expensive. Luckily for me, I have all the required material stored in the garage. Much of it was picked up at the local scrap yard. Also, a few years back, a nearly new exhaust sytem was spied on a late 70's Mercedes 450SL V8 car that was sitting in the local auto salvage yard....A complete front to back dual stainless system w/ 2 mufflers! Further examination showed it to be an $800+ Timevalve aftermarket system, it came home with me for $30, and in the garage it has sat... just waiting to be cut up for a project such as this! The pipe is 2" and 1 7/8" with plenty of nice bends. The main muffler measures 25" L x 7" diameter and has dual 2" in and out with straight though perforated core (like Borla). The stock FZJ80 muffler measures roughly 24"L x 8" diameter. Ooooooh what a nice fit that will be... tucked 1" higher in the frame.
That's it for part 1.... Warmer weather will need to arrive before the work begins. I will update with plenty of pictures if you folks would like to see them!
Part of the Timevalve system..
Part of my stainless steel stash..
Previous work....
